Wildlife officials are investigating the death of OR-54, a female wolf whose carcass was found in Northern California.

It had been weeks since biologists at the California Department of Fish and Wildlife were able to track the gray wolf’s movements.

She had been crisscrossing Northern California for nearly two years, after she separated from her pack in Oregon and traversed state lines. Biologists had followed her movements using a radio collar that wildlife specialists in Oregon placed around her neck in 2017.